Punching machine



Sept. 17, 1929. c. H. CAVILL PUNCHING MACHINE Filed Sept. 13. 1928INVENTOR BY [/az/ae C'arzaii/ WZ Patented Sept. 17, 1929' UNITED STATES:

CLAUDE nc vILL, or JAoxson, MICHIGAN PUNCHING MnoHInE i I Applicationfiled September 13, 1928. Serial No. 305,660.

The main objects of this invention are: First, to provide an improvedpunch for paper and the like which is adapte'dfor punching holes ofseveral sizes and shapes, the machine beingquickly adjusted for theparticular work desired.

Second, to provide a punching machlne having these advantages which maybe ad justed by a comparatively unskilled person. Further objects willappear from the detailed description to follow. The nvention is definedin the claims.

A structure which embodiesqthe, feature of my inventionisclearlyillustrated in the accompanying drawing, in which: l v Fig. 1is a front perspective view of my improved punching machine.

Fig. 2 is a detail view partially -1n vertical transverse sectionon line22 of Fig. 3. 2 Fig. 3 is a detail view partially in vertical section online 33 of Fig. 2. P

Fig. 4 is'a perspective View of the tappet bar removed from the machine.

The embodiment of my invention illus- 25 trated in the accompanyingdrawing comprises a base 1 having a longitudinal opening 2 adapted toreceive the lower portions of the punch heads 3 which are slidablymounted on the base. These punch heads are shouldered at 4 to engage inthis opening, as shown in Fig. 2.

At the ends of the base I'r'nount a pair of Supports 5 which areundercut at 6 to provide a'space between the forward port-ions of thesupports and the base. Punch'head supporting bars 7 and 8 are carriedbythese sup ports, the bars being arranged through open-' ings in thepunch heads so that the punch heads are slidable thereon. ySet screws 94 and 10 are provided for securing thepunch heads in their adjustedpositions. H

Each punchheadis provided with a plurality of vertical bores or openingsof'the size and shape of the punch desired, four openings being.provided in the head shown,

as 11, 12, 13 and 14. "The punch heads have work throats 15. Theportions '16 of the punch heads below this throat constitute the diemembersand have openings 17 18, 19 and 20' corresponding in crossdimensions and shape to the openings 11, 1'2, 13 and 14. c

The punches-21, 22, 23 and 24 reciprocate in the openings 11, 12, 13andl4, respectively. These puncheshave reduced shank por- V tions 25 andheads 26 threaded upon the" shank portions. Springs 27 are arranged inthe punch bores tofengage the heads 26, act ingto return the punches.The punches are normally held by these springs againstthe stop pin 28which is arranged transversely of the punches in abore 29 formed in thepunch head so that the single stop pin coacts all of the punchesofapunch head. i

The frame-like actuating lever 30 is pivoted at 31 on'the supports 5 andcarries a longitudinally slotted tappetbar 32 which is adjustablysecured to the end members 22 of the lever by means of the screws 34,the end members having holes 35 therein to receive these screws. I I kThe tappet-s 36 are adjustably supported in the slots 37 of the tappetbarso that they may be adjusted longitudinally thereof in ac cordancewith the adjustment of the punch heads, the bar being adjusted so thatthe lever coacts with selected punches.

A gage or stop bar 38 is adjustably mounted on the supports by means ofscrews 39,

and gage indicia 40 is provided to facilitate I the adjustment. Thisstop bar is adjusted in the throats of the punch hea'dsso as to stop thework in proper position for the particular set ofpunches it is desiredtouse. As shown in Fig. 2 the parts are adjusted for using'the punches 22.I W

An edge gage 41 is slidably mounted in a dove tailed longitudinal groove42 atthe front of the base, gaging indicia being associated with thisgage and the indicia being in two sets reading from the center.

It is quite common practice for customers to expect and requeststationers to punch sheets with holes of desired size and in certainpositions. This usually requires the setting up of a punching machinewith suitable punch heads and requires considerable time and skill. Myimproved punching machine may be quickly adjusted for a considerablevariety of work resulting in a great saving of time and eliminating thelikelihood of errors.

I have illustrated and described my improvements in an embodiment whichI have found very satisfactory. I have not at-. tempted to illustrate ordescribe other embodiments or adaptations as I'believe this disclosurewill enable those skilled in the art to adapt my improvements as may bedesired.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. In a punch, the combination with abase',

q the punches, a stop bar adjustable in said throats and adjustablysecured to said supports, one of which is provided with gage indiciaoperatively associated with said stop bar, an actuating lever pivotallymounted on said supports,a longitudinally slotted tappet bar mounted onsaid lever to be adjusted to operative relation to selected punches, andtappets mounted in said slots for adjustment in accordance with thelateral adjustment of said punch heads. 7

2. In a punch, the combination with a base, support members mounted atthe rear of said base to project forwardly in overhanging relationthereto, front ant. rear head supporting bars carried by said supportmembers, punch heads slidably adjustable on said base and havingopenings toreceive said bars, said heads being provided with set screwsfor adjustably securing them to said bars and each being provided with aplurality of punches arranged in alinement from front to rear and withwork receiving throats common to all of the punches, an actuating leverpivotally mounted on said supports, a longitudinally slotted tappet barmounted on said lever to be adjusted to operative relation to selectedpunches, and tappets mounted in said slots for adjustment in accordancewith the lateral adjustment of said punch heads.

3. In a punch, the combination with a base,

an r 1,728,475

support members mounted at the rear of said base to project forwardly inoverhanging relation thereto, front and rear head supporting barscarried by said support members, punch heads slidably adjustable on saidbase and having openings to receive said bars, said heads being providedwith set screws for adjustably securing them to said bars and each beingprovided with a plurality of punches arranged in alinement from front torear, and with work receiving throats common to all of the punches, astop bar adjustable in said throats, and an actuating lever pivotallymounted on said supports and provided with adjustable punch engagingmembers.

4. In a punch, the combination with a base, support members mounted atthe rear of said base to project forwardly in overhanging relationthereto, front and rear head supporting bars carried by said supportmembers, punch heads slidably adjustable on said base and havingopenings to receive said bars, said heads being provided with set screwsfor adjustably securing them to said bars and each being provided with aplurality of punches arranged in alinement from front to rear, and anactuating lever pivotally mounted on said supports and provided withadjustable punch engaging members.

5. In a punch, the combination with a base, punch heads adjustablymounted on said base and each being provided with a plurality of punchesarranged in alinement from front to rear and with work receiving throatscommon to all of the punches, a stop bar adjustable in said throats, anactuating lever pivotally mounted onsaid supports, a longitudinallyslotted tappet'bar mounted 011 said lever to be adjusted to operativerelation to selected punches, and tappets mounted in said slots foradjustment in accordance with the lateral adjustment of said punchheads.

6. In a punch, the combination of abase, a plurality of punch headsmounted on said base for lateral adjustment thereon and each providedwith a plurality of punches alined from front to rear, an actuatinglever and punch engaging members mounted on said lever for adjustmentinto operative relation to selected punches, and a stop member common toall of the punch heads adjustably associated therewith.

7. In a punch, the combination of a base, a plurality of punch headsmounted on said base for lateral adjustment thereon and each providedwith a plurality of punches alined from front to rear, an actuatinglever and punch engaging members mounted on said lever for adjustmentinto operative relation to selected punches.

8. In a punch, the combination with a punch head provided with aplurality of alined punch bores and a. retaining pin bore disposedtransversely of said punch bores and opening to one side thereof,punches having hand.

CLAUDE H. CAVILL.

